Automatic magic-lantern apparatus.



PATENTED Nov. 29, 1904.

M. BENTZON. AUTOMATIC MAGIC LANTERN APPARATUS.

APPLICATION FILED OGT.12, 1903.

.-N0 MODEL.

fiwelzfor Wlinesses.

PATEN'IED NOV. 29, 1904.

M. BENTZON.- AUTOMATIC MAGIC LANTERN APPARATUS.

APPLICATION FILED OCT-12. 1903.

5 SHBETS-SHEBT 2.

.NO MODEL.

Ewe/2Z0)". WWW PM No. 775.963. PATENTED NOV. 29, 1904.

M. BENTZON. AUTOMATIC MAGIG LANTERN APPARATUS APPLICATION FILED OUT. 12,1903.

H0 MODEL. 5 SHEETEP'QHEET 3.

PATENTED NOV. 29, 1904.

M. BENTZON. AUTOMATIC MAGIC LANTERN APPARATUS.

APPLICATION FILED OGT. 12, 1903.

5 SHEETS-SHEET 4.

vN0 MODEL Min/5 52565 /1 /QZW @(MLAM PATBNTEDJNOV. 29, 1904.

M. BENTZON. AUTOMATIG MAGIU LANTERN APPARATUS.

APPLICATION FILED OUT. 12, 1903.

R QF EBTS-SHEET 5. A

E10 MODEL.

WQJLW (5 NlTE Stars Patented November 29, 1904.

l n'rhivr tries.

AUTOMATlQ MAGlG-LANTERM APPAHATU%.

SPECIFICATION forming part of Letters Patent No. 775,963, dated November29, 1904.

Application filed October 12, 1.903- Scrial No. 176,661. (No model.)

To It whom 111; vim/y concern.-

Be it known that I, MALooLM BEN'lZON, a subject of the King of GreatBritain, residing at 126 Queens Gate, SouthKcnsington, London, England,have invented new and useful Improvements in Automatic Magic-LanternApparatus, of which the following is a speciiication.

My invention is for an improved apparatus whereby pictures may beprojected by rays of light onto a screen after the manner of a magiclantern, and has for its object the pro I d action of novel andeffective means for aceom plishing this end by mechanism and devicescapable of being operated by manual, electrical, or other power in sucha manner that a picture, a predetermined number of pictures, or a numberof series each containing a predetermined number of pictures can beautomatically exhibited upon the machine being set to work by coin-freedapparatus or by other means and which may be employed for amusement,instruction, or advertising.

In the accompanying drawings, Figure l is a sectional front elevation ofapparatus con structed according to my invention and designed to be putinto operation by the insertion of a coin therein. Fig. 2 is a sectionalplan thereof. Figs. 3 and 4 are respectively sections on the lines 3 3and i 4;, Fig. 1. Fig. 5 is an end elevation of a portion of theapparatus. Figs. 6 and 7 are elevations of cams. Fig. 8 is a sectionalfront elevation of the apparatus designed more particularly foradvertising purposes. Fig. 9 is a section on the line 99, Fig. 8. Fig.10 is a sectional front elevation of the apparatus designed to beoperated by hand. Fig. 11 is a section on the line 11 11, Fig. 10. Fig.12 isa plan of adetail of the apparatus shown in Figs. 10 and 11, andFig. 13 is an elevation of another detail thereof drawn to an enlargedscale.

Like letters indicate corresponding parts throughout the drawings.

In carrying out my invention, which i will describe first by referenceto Figs. 1 to 7, I provide in a case a, which may be fixed against awall or to any suitable support and may sometimes have the externalappearance of a miniature stage, a lantern 7), having ob ective andcondensing lenses 0 (Z for projecting transparent pictures onto a screen6, of any suitable mate rial. I arrange the screen preferably in thefront of the case, as shown clearly in Figs. 2 to t, and the lanternparallel therewith, a n1irrorf' or other reiiecting-surfaee beingemployed to reflect the pictures onto the screen. By this arrangement Iprovide an apparatus of less depth than would be the case if thepietures were projected directly onto the screen. Within the case a andnear and parallel with the back thereof and with the lantern l. providea tray or platform g. This tray is provided with wheels g, running uponrails and is arranged to be intermittently moved longitudinally ineither direction by a screw it engaging a nut h under the said tray andcontains in suitable spaces 5 between equidistant vertical divisions anumber of pieture-slides vi, the said tray being arranged to be broughtinto such a position by the screw it that one of the picture-slides ican be moved or slid into grooves 1" in the usual space '11 in thelantern for exhibiting and afterward be restored to its space ordivision in the tray 9 when the picture has been exposed for a givenperiod. To insure the easy entry of each picture into the lower groovev1, I provide a roller 27", Fig. 3. Each intermittent movement of thetray agrees exactly with the distance from center to center of thespaces 9, so that whenever the tray comes to rest a slide is always inthe correct position for insertion into the space if. For moving thepicture-slides I employ two depending arms Z: Z Figs. 1 and 3, arrangedto slide upon a bar A5, the arm Z serving to move the slides from thetray into the space 1: and the arm Z." serving to return them to thesaid tray. The arm A: is reeiprocated by a lever 1, connected to thesaid arm and fulcrumed at l, the arm is being moved by the arm Z throughthe medium of a spring h when the latter arm is moved to push a slidefrom the tray and returned to push the slide back onto the tray by meansof a red A", connected to the lever I. As owing to wear and tear of thejoints of the connection I to the arm is and of other cooperating partsthe slides 5 might be left projecting from the side i of the traynearest the lantern, I provide for moving the lever [farther than isactually required for returning the slide to the tray, and I arrange tostop the arm 7t" before the lever Z has finished its movement. This iseflected by the employment of a stop in", with which the said arm makescontact, a spring in being interposed between nuts lion the rod if and alug it' on the said arm, through which the said rod passes. Foroscillating the lever l I provide a double cam m m. on a shaft m the campart m acting upon the lever to move the picture-slides from the tray tothe lantern and the cam part 122/ acting upon the said lever to returnthe slides to the tray. The shaft m is driven from a suitable motor,such as an electric motor 92, Fig. 1, through the medium of the belt a,pulley n pulley 02 belt 22 pulley a, shaft 11", worm n, Worm-wheel nclutch part a attached to the wheel of, and clutch part a", in slidingconnection with the shaft m As it is essential that when each slide isreturned to the tray the arms In it" should be moved slightly in theopposite direction to free the arm Z1 from the slide and yet notsuflicient to bring the arm in back into contact with the slide in orderthat the tray may be free to be moved longitudinally, I provide the camm with an elevation m and the cam m with a corresponding depression bf.These cams are shown detached in Figs. 6 and '7. To prevent a blank diskof light being shown on the screen during the time a slide is beingmoved into or out of position for exhibiting, I arrange a shutter Z) infront of the objective-lens and pivoted at b and provided with an arm 7)against which a pin 7) on the arm A" strikes as the latter moves when aslide is passed into the space 2' so as to move the shutter out of linewith the said lens. For intermittently moving the tray 9 I provide thescrew it with a ratchet-wheel 0, designed to be operated by a pawl 0from a cam 0 on the shaft on through the medium of a lever 0 rod 0*,lever 0", and link 0, the pawl being carried on an arm 0 loose on thescrewshaft h. The ratchet-wheel 0 is so designed that each reciprocationof the pawl in one direction turns the screw /2, so as to move the traya distance corresponding with that be tween the centers of two adjacentslides.

As already stated, my improved apparatus can be arranged so that anumber of series of pictures, each series containing a predeterminednumber, can be exhibited. This arrangement is illustrated in Figs. 1 to7, the apparatus containing twelve series, each consisting of sixpictures, a handle p being provided for enabling the user to operate thetray g untila pointer 19, Working overa scale ordial 3 indicates thenumber of the particular series he requires exhibited, the said pointerbeing driven by gearing 12 from the screw-shaft 72 This handle 19 isarranged to rotate a sprocketvvheel p in the manner hereinafterdescribed, which Wheel through the medium of a chain the tray g alongbeing caused to move into the position indicated by the dotted lines inFig. 3 by the tail 0 coming into contact with the under side of one ofthe rails or any equivalent stop.

hen my invention is used in connection with coin-freed apparatus, as inFigs 1 to 7, and which may be of any suitable kind, the mechanism is soarranged that only when a coin is passed into the coin-slot Q can thehandle p be operated. For this purpose thehandle p is not directlyconnected to the sprocketwheel p, but is arranged to operate the latterby the following mechanismthat is to say, the handle and thesprocket-wheel p are respectively connected to bevel-wheels p and pturning upon a shaft 1). The latter carries a sleeve 1), havingaspindlep on which is mounted another bevel-wheel, 1), gearing with the wheelsgfp So long as no resistance is offered to the wheel p it will when thehandle 1) is rotated gyrate around the shaft 2 without moving thesprocket-wheel p; but if a stop be placed in its path, so that it cangyrate no longer, the bevel-wheel p and consequently the sprocket-wheel11 will be rotated. This stop I arrange in the form of a pin '1" on alever w, connected to a lever 1-", carrying the coin-receptacle r sothat when the latter moves down under the weight of a coin the said pinis placed in the path of the spindle 29 carrying the wheel so that ifthe handle be turned the said spindle will come into contact with thesaid pin and the sprocketwheel 12 will be operated to move the tray 9.The coin-receptacle lever '2' is pivoted at 1'" and carries a link 1which engages a pivoted pawl or stop 1*", normally in engagement with anabutment r on a pivoted stop-plate W, to which is connected a handle routside the apparatus and which 1 term the starting-handle. This handleis connected with mechanism for starting the apparatus and when theapparatus is not in use is in the off position, (shown by the full linesin Fig. 5,) it being maintained or locked in the said position by reasonof the engagement of the stop with the abutment r. W hen, however, acoin is inserted into the coin-receptacle, the latter consequently movesdown and lifts the stop 1" out of engagement with the stop-plate 1' andallows the starting-handle r to be moved into the on position. (Shown bythe dotted lines, Fig. hen the desired number of the series to beexhibited has been obtained by the handle 1), the starting-handle r isthen moved from the off to the on position, carrying with it thestop-plate r upon which is a pin 2". The coin-lever r or its pivot-shaftis provided erases.

with an arm 1' which impinges against the pin a" when the lever r" is inits lowered position. Consequently the first movement of thestarting-handlc r will cause the coin-lever to bedriven upward, andthereby discharge the coin from the bucket in a known manner and at thesame time raise the pin r out of contact witlr the spindle p of thebevel-wheel so thatthe handle 2) is rendered inoperative and no furthermovement of the tray 1 and the the total number of series, and I soconnect it with the indicator that unless the latter correctly points tothe required series the appa ratus cannot be put into action. For thispurpose I provide a roller or pin 8*, carried by a lever at to engagethe said notches. The said lever carries a hinged spring extension-pieces", the lower end of which can pass over a projection s on thestop-plate r hereinbefore describedgwhen thelatter is in the positionshown in Fig. 4. The notches correspond with the figures on the dialofthe indicator. it will be seen, therefore, that until the roller orpin is in a groove the starting handle or lever r cannot be operated.For throwing the clutch part a into gear with the clutch part a tostartthe apparatus to exhibit a series of pictures, the starting-handle r isconnected, through the medium of a lever enrod a, bellcrank a and rodtrite a levert on a shaft carrying a fork Z engaging the clutch part a",so that when thesaid handle is moved from the off to the on positionitwill engage the said clutch parts together and drive the shaft of apivoted hook a being provided which engages a pin it on the said lever25 to keep the parts of the clutch engaged while the series of picturesis being exhibited. To disengage the hook when the series has beenexhibited, l provide a disk t on a shaft 1' operated bysuitablyproportioned gear-wheels I from the shaft m the saiddisk havinga pin t which at a certain part of the rotation of the disk comes intocontact with and moves a lever 25, connected to the hook t, and so liftsthe latter out of engagement with the pin t on the lever and allows thesaid lever z to disengage the clutch parts by the'traction of a springThe disk 25" is further provided with a notch into which passes an arm Ion the shaft and thus instantaneously stops the apparatus. The bell-crank 1/7 is arranged, as shown. to operate a tumbling (or other)switch r by a lever r" to complete the electric circuit, including themotor a, the circuitbeing again broken on the reverse movement of thebellcrank when the series of pictures has been exhibited. Where anelectric lamp is employed in the lantern, it may be included in the samecircuit as the motor, i s to becut in or outol' thecircuitsimultaneorisly with the said motor.

Forthe purpose ofpriwenting the fraudulent use of the apparatus byretaining the starting handle'in its on position, so as to keep theclutch parts a a" in gear. i provide the following ar-=rangement-----that is to say, therod a .l arrange to slide in guides andconnect itto a spring 11% When the rod;

which tends to draw it upward is pulled downward by thesti.rting-handleif. a bent arm n, pivoted on the rod a; eng a pin a on one end of thcl'ielhcrahkIn,

and

so enables the latter to .be operated. as herein-1 beforedescribed, toengage the clutch parts a la/fl. The bent arm '.a"-isprovided with anexteii siolrrd, which comes into. contact with a lixed stop it? andthrows theend of. the bent arm a out of contact with thetpin in on thebell-crank- As thelbent arln drscornli-i a stud a thereon passes beneathan it icl i and tn inl iler a and when it ascends it travels on theoutside of the latter. tiy this arrangcnicnt the bent arm canonly bebrought into operation .on the downstroke and is disengaged thereries ofpictures has been exhi bited-Qhvh'cn the: tray giwill be at one end ofits traveh'lit will. ibe neccssary to. turn the handlep so as to. movethe tray. back in order to exhibited: other series, and assuming that a.further coin. hasbeen inserted to operate the mechanism before thehandle is so moved i provide nieaus whereby the .startinghandle isprevented froinbeing worked (whereby the coin mutt be discharged fromthe receptacle 1", as hereinbefore described) until such time as thetray has been moved back to the series required. In order to accomplishthis, Il attach to the pawl r a springr'; and l place on the notchedwheel s a pin or stud n in such a po. sition that it'will come intocontact with the said spring when the last series of pictures is beingexhibited, so that the pawl r' is prevented from rising out ofengagement with the abutment on the plate under the weight of the coinin the coin-recinitaclc. in order,.

however, that the coin-receptacle can move .down sufficiently to placethe pin w in the path of the spindle 9, so that the handle 71 can beoperated to move the tray back to the series of pictures required, 1slot the link i erator in correctly placing the indicator.

In the arrangement of apparatus illustrated by Figs. 8 and 9 and whichis more particularly adapted for advertising purposes, I dispense withthe coin-freed starting and indicating apparatus, already described withreference to Figs. 1 to 7, and aclock or other timing mechanism may beused to switch on or off the electric current for the electric motor andlamp where such is used. The parts of the said apparatus I designate bythe same signs as those used in describing Figs. 1 to 7, but with theaddition of the letter a as or in addition to the index-sign. In thisarrangement the shaft 25 and gear-wheels 2? described in connection withthe arrangement illustrated in Figs. 1 to 7 are dispensed with, the diskt being placed upon the shaft 727/ so that the whole series ofpicture-slides on the tray 9 are exhibited in consecutive order. Forautomatically returning the tray 9 to its initial or starting positionafter all the slides have been exhibited, and so that they can again beexhibited, I provide the following arrangementthat is to say, I arrangeon the worm-shaft n a pulley w for transmitting motion by means of abelt or cord 1/ to a pulley w loose on the screw-shaft if, the saidpulley being connected with the one part, m

of a friction-clutch, the other part of which,

w, is in sliding connection with the screwshaft it and is pressed towardthe" part :0 by a spring 1. the said parts when in engagement serving torotate the screw-shaft /t to return the tray 9 to its starting positionat a velocity relatively high as compared with that at which the shaftrotates when exhibiting the pictures. The clutch part 00 is providedwith a pivoted clutch-fork {66, designed to be operated to disengage theparts of the clutch, as hereinafter described. The fork t of the clutchpart 229 on the shaft m carries the arm t to engage the notch in thedisk t and it also carries the pin 25*, with which the pivoted hook tengages. The said clutch fork is also forked at its lower end andengages a pin [1' on a tumbling weighted lever 50*, the lower end ofwhich serves, when the tumbler 111 is in one extreme position, to strikethe clutch-fork .2" and disengage the clutch parts 1 and (If, so as tostop the rotation of the shaft it and at the same time operate theclutch-fork 2 to engage the parts 71 and a of the clutch on the shaft mand rotate the latter. In order to hold the clutch part out ofengagement with the clutch part a during the time the tumbler is movingout of contact with the fork (0 when moving from one extreme position tothe other, I provide a pivoted hook :20, designed to engage a pin 0 onthe said fork a, which hook, however, is disengaged by the tumblerduring such movement, the said tumbler being provided with an arm 50,which comes into contact with an upward extension 0 of the hook 50 asshown clearly in Fig. 8. The operation of the said clutches is effectedby the tray g when at the extremes of its movement in either direction,and for this purpose I provide it with a bar or rod y, one end nectedby'a rod g to the clutch-fork 25, while the other end of the bar y isdesigned to impinge against one arm of a bell-crank g the other arm ofwhich is connected by a rod y* to the pivoted hook 6 By this arrangementit will be seen that, assuming the parts to be in the position shown inFig. 8, in which the tray g is indicated as moving back in the directionof the arrow to its initial position, when the tray arrives at the saidposition the bar 3 will impinge against the lever y and move it and theclutch-fork t to the position indicated by the dotted lines, whereby theclutch parts 12 and a will be engaged to rotate the shaft on? andexhibit the slides in consecutive order and intermittently rotate theshaft it, as hereinbefore described, and the tumbler a will also bemoved to the dotted-line position to disengage the clutch parts and\Vhen the tray 9 arrives at the other end of its movement, the bar ywill impinge against the bell-crank 3 and move the hook 23 to releasethe clutch-fork t, which will be pulled back by the spring yanddisengage the parts of the clutch of n? and at the same time move thetumbler back to the position shown in full lines to release theclutch-fork T and allow the clutch parts .11 and a? to reengage by meansof the spring (/1 so that the screw 76 will be rotated by the pulley ato again return the tray 9 to its initial position. In cases where itmay be necessary to exhibit a smallernumber of lantern-slides, andconsequently to return the tray to its initial position before it hascompleted its full travel, I form the bar y so that it can be lengthenedso as to operate the bell-crank earlier than would be the case ,if thefull number of slides were used. For this purpose I form the bar in twoparts which may be relatively adjusted by means such as setscrews in theone part engaging a slot y in the other part.

The arrangement of apparatus illustrated in Figs. 10 to 13 is designedto be operated by hand and is intended for use more particularly in theclass-room, the lecture-hall, or the home circle. The parts of thisapparatus I designate by the same signs as those used in describingFigs. 1 to 7, but with the addition of the letter I) as or in additionto the indexsign. In this arrangement the shaft m is oscillated (insteadof rotated, as hereinbefore described) by means of ahandlez outside thecase a, limited in its movement by stops 2. The lever Z" is looselypivoted upon one end of the said shaft and is designed to be oscillatedto move the arms is it by an arm .2, attached to the shaft m the saidarm being vvaeea provided with a slot .2 engaging a pin .2 on

the lever I, so that assuming the parts to be in the position shown bythe full lines in Fig. 11, in which the pin z is located at one end ofthe slot .2 if the lever be moved to. the left it will be moved acertain distance determined by the length of the slot .2 before thelever l" is moved. This interval between the starting of the levers andthat of the lever l allows the tray g to be fed by the screw /1 to bringa picture-slide into position for exhibition. For effecting this feedingmovement the cam 0 on the shaft m is in the form of an arm bent at theouter end to form a surface? concentric with the center of the shaft mand I arrange a pivoted lever .2 one end of which bears against the saidcam, as shown in Fig. 11, to be operated in one direction thereby, itbeing operated in the reverse direction by a spring .2. The other end ofthe lever is provided with a segment of teeth, which engage a pinion .2Fig. 13, loose on the screwshaft 723. The pawl 0" for operating theratchet-wheel 0 (which in this arrangement has only one tooth) iscarried upon a disk .2, fixed to the pinion 2 By this arrangen'ientduring the interval between the starting of the lever .2 and the momentwhen the lever Z commences to move the cam operates the lever to rotatethe shaft it by means of the pinion .2, disk 4, and pawl 0, the leverriding against the concentric portion .2 of the cam, while the lever Z"is operating thearms 1:" k to move a picture-slide into the lantern. Inorder to move the arm Zv slightly back out of contact with thepicture-slide it has been moving in the tray, as hereinbefore described,I provide in this arrangement a spring-block a, working in a guide onthe arm is" and designed to come into contact with a fixed stop 2' sothat directly the handle .2 is released after the return movement thesaid arm Z1" will be moved slightly toward the lantern, and consequentlymove the arm a clear of the slide, the pressure of the said spring-blockbeingsuch that it overcomes the pull of the spring .2 on the lever .2The handle p in this arrangement is connected to the screw-shaft it"through the medium of gear-wheels .2 and serves to move the tray, so asto bring any slide into position for exhibition, each slide having acorresponding number on the indicator-dial instead of each series, as inthe arrangement illustrated in Figs. 1 to 7. In order that the shaft l1may not be operated by the handle during the movement of the handle .2,I arrange the said handle p independentof but adapted to drive the shaftp for instance, by means of a slot Fig. 12, in the said handle engaginga pins on the said shaft--and I provide that unless the handle 72 isremoved from the said shaft the handle cannot be operated. For thispurpose I attach to the lever an arm .2, the lower part of which forms ashutter curved shaft.

crmcentricrlly with the axis of the pivot of the said lever. so thatduring the movement of the latter it will cover the holes. through whichthe handle 21" is inserted to engage the When, however, the lever .2 isin the position shown in Fig. ll. a hole 2 with which the said shutteris provided, coincides with the hole .2 and allows the handlep" to beinserted and operate the tray to bring another slide into position forexhibition. The indicat-or in this arrangement I have shown in the formof a rotating dial 71 within the case a), instead of a pointer workingover a dial, as in the arrangement shown in Figs. 1 to 7, the number onthe dial being visible through a hole 2" in the case c.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is-- l. T he combination with an inclosing casing of lessdepth than width and having atranslucent screen in its front face, of alantern disposed transversely within said receptacle and a singlereflecting-mirror in rear of said screen and in line with the lenses ofthe lantern, substantially as described.

2. The combination with an inclosing casing of less depth than width,and having ascreen in its front face, of a lantern disposed transverselywithin said receptacle, a single reflecting-mirror in rear of saidscreen and in line with the lenses of the lantern, a movablepicture-slide carriage located on the side of the lantern opposite thescreen, means for moving said carriage longitudinally with respect tothe lantern, and transferring mechanism for moving the slides from saidcarriage into and out of the lantern, substantially as described.

3. The combination with an inclosing casing of less depth than width andhaving a screen arranged centrally of its front face, or wall, of alantern arranged within said casing and disposed transversely thereofand at one side of the center of the casing, a reflector arranged inrear of the center of said screen and in line with the lenses of thelantern, a traveling picture-slide carriage arranged on the side of thelantern opposite said screen, means for traversing said carriagelongitudinally with respect to the lantern and mechanism fortransferring the slides from said carriage into and out of said lantern,substantially as described.

4C. In a picture-projecting apparatus, the combination with a lantern,of a longitudinally-movable carriage arranged adjacent to said lantern,mechanism for moving said carriage longitudinally to bring thepicture-slides carried thereby into position to enter the lantern, atransferring mechanism for moving said slides into position in thelantern and moving them back into said carriage and handoperatedmechanism connected with said carriage-operating mecl'lanism for movingsaid carriage to bring any particular slide into operative position withrespect to said transferring mechanism, substantially as described.

5. In a picture-projecting apparatus, the combination with a lantern, ofa longitudinally-movable picture-slide carriage arranged at one side ofthe lantern, a feeding-screw for imparting a longitudinal movement tosaid carriage, mechanism for intermittently operating said screw in apredetermined manner and feeding said carriage to bring thepictureslides successively into operative position with respect to thelantern, independent hand-operated mechanism for said screw to bring anyparticular slide into operative position and ahorizontally-reciprocating transferring mechanism for moving said slidesinto the lantern and restoring them to the carriage, substantially asdescribed.

6. In a pictureprojecting apparatus the combination with a lantern, of alongitudinally-movable picture-slide carriage arranged at one side ofthe lantern, afeeding-screw for imparting a longitudinal movement tosaid carriage, mechanism for intermittently operating said screw in apredetermined manner and feeding said carriage to bring thepicture-slides successively into operative position with respect to thelantern, mechanism for operating said screw in a reverse direction and ahorizontally-reciprocating transferring mechanism for moving said slidesinto the lantern and restoring them to the carriage, substantially asdescribed.

'7. In picture-projecting apparatus or the like the combination with thelantern of a carriage adapted to move longitudinally at one side of thelantern, of a screw engaginga nut of the carriage, means forintermittently rotating the screw a predetermined distance, atransferring devicecomprising: arms depending from a bar upon which theyslide for moving the pictures into and from the lantern, and means foroperating the said transferring device independently of the carriagetraversing mechanism, substantially as described.

8. In picture-projecting apparatus the combination with the lantern of acarriage adapted to be moved longitudinally of the said lantern and tocarry two or more series of pictures, of mechanism adapted to beoperated by hand for bringing any one of the said series into proximityto a device for transferring the pictures into and from the lantern andof automatic mechanism for traversing the carriage for bringing theseveral pictures of the series successively into position to betransferred, substantially as described.

9. In a picture-exhibiting. apparatus, the combination with a lantern, alongitudinallymovable picture-slide carriage arranged at one side of thelantern, mechanism for feeding said carriage longitudinally, a pair ofdepending arms arranged to reciprocatehorizontally, for transferring.the picture-slides from said carriage to and from the lantern andoperating mechanism for said arms having provision for permitting saidarms to move with respect to each other, to facilitate the releasing ofthe slides, substantially as described.

10. In a picture-exhibiting apparatus, the combination with a lantern, alongitudinallymovable picture-slide carriage arranged at one side of thelantern, mechanism for feeding said carriage longitudinally, a pair ofdepending arms arranged to reciprocate horizontally, for transferringthe picture-slides from said carriage to and from the lantern, anoperatinglever connected to one of said arms, a yielding connectionbetween said lever and said second arm and a stop for arresting saidsecond arm on its return movement to permit said arms to separate andrelease the slide, substantially as described.

11. In a picture-exhibiting apparatus, the combination with a lantern, alongitudinallymovable picture-slide carriage arranged at one side of thelantern mechanism for feeding said carriage longitudinally, a pair ofdepending arms arranged to reciprocate horizontally, for transferringthe picture-slides from said carriage to and from the lantern, anoperatinglever connected to one of said arms, a yielding connectionbetween said arm and the second arm for moving it in one direction, ayielding connection between said lever and said second arm for moving itin the other direction and a stop for arresting said second arm on itsreturn movement to permit said arms to release the slides, substantiallyas described.

12. In a picture-exhibiting apparatus, the combination with a lanternand a pivoted shutter for obstructing the lenses thereof, of alongitudinally-movable picture-slide carriage arranged at one side ofthe lantern, mechanism for moving said carriage longitudinally, areciprocating transferring device for moving said slides from thecarriage into the lantern and returning them to the carriage and a parton said transferring device for engaging said pivoted shutter and movingit out of line with the lenses of the lantern when a slide istransferred to the lantern, substantially as described.

13. In a picture-exhibiting apparatus, the combination with a lantern,of a longitudinally-movable pictureslide carriage arranged at one sideof the lantern, a horizontally-movable transferring device fortransferring a slide from the carriage to the lantern and returning itto the carriage-actuating mechanism for said transferring device, astartinglever for said actuating mechanism and mechanism for preventingthe operation of said starting-lever until one of the slides is broughtexactly into operative position with respect to the transferring device,substantially as described.

14. In a picture-exhibiting apparatus, the combination with a lantern,of a longitudi- IOC nalLv-movable picture-slide carriage arranged at oneside of the lantern, a horizontallynnovable transferring device fortransferring a slide from the carriage to the lantern and returning itto the carriage, actuating mechanism for said transferring device andfor said carriage, and independent hand operated mechanism for movingsaid carriage to bring a particular slide into operative relation withthe transferring device, a starting-lever for said actuating mechanismand mechanism for preventing the operation of said starting-lever untila slide has been brought exactly into operative relation with thetransferring device, substantially as described.

15. In a picture-exhibiting apparatus, the combination with a lantern,of a longitudinally-movable picture-slide carriage arranged at one sideof the lantern, a horizontally-movable transferring device fortransferring a slide from the carriage to the lantern and returning itto the carriage, actuating mechanism for said transferring device andfor said carriage, and independent hand operated mechanism for movingsaid carriage to bring a particular slide into operative relation withthe transferring device, a starting-lever for said actuating mechanismprovided with a projecting arm, a rotary disk operatively connected withthe carriage-feeding mechanism and provided with a series of notches, apivoted detent-lever having a part for engaging said notches and a partfor engaging the arm connected with the starting-lever to prevent theoperation thereof until a selected slide in said carriage is broughtexactly into operative relation with the transferring device,substantially as described.

16. In a picture-projecting apparatus, the combination with a lantern,of a longitudinally-movable picture-slide carriage arranged at one sidethereof, a transferringmechanism adapted to move the slides into thelantern and return them to the carriage, mechan* ism for transferringthe carriage, a motor for operating said transferring mechanism andcarriage-traversing mechanism, a starting device for connecting saidmotor operatively to the mechanisms operated thereby and devices forautomatically disconnecting said starting device from the mechanismwhich it controls as soon as it has performed its function,substantially as described.

17. in a picture-projecting apparatus, the combination with a lantern,of a longitudinally-movable picture-slide carriage arranged at one sidethereof, a transferring mechanism adapted to move the slides into thelantern and return them to the carriage, mechanism for traversing thecarriage, a motor for operating said transferringmechanism andcarriage-traversing mechanism, a clutch for connecting said motor withthe mechanisms operated thereby, a starting device, operativelyconnected to said clutch and mechanism interposed between a part of saidstarting device, and the said clutch for automaticallydisconnecting-said parts, substantially as described.

18. In a picture-projecting apparatus, the combination with a lantern,of a longitudinally-movable picture-slide carriage arranged at one sidethereof, a transferring mechanism adapted to move the slides into thelantern and return them to the carriage, mechanism for traversing thecarriage, a motor for operating said transferring mechanism andcarriage-traversing mechanism, a clutch for connecting the said motorwith the mechanisms opera-ted thereby, a switch controlling the motor, astarting device and connections between said starting device and saidswitch and said clutch for operating the same and automaticallydisconnecting said starting device therefrom, substantially asdescribed.

19. In a picture-prejecting apparatus, the combination with a lantern,of a longitudinally-movable picture-slide carriage arranged at one sidethereof, a transferring mechanism adapted to move the slides into thelantern and return them to the carriage, mechanism for traversing thecarriage, a motor for operating said transferring mechanism andearriage-traversing mechanism, a starting device for connecting saidmotor with the mechanisms to be operated thereby, mechanism forautomatically disconnecting said starting device, andindependentmechanism for traversing the carriage to bring a particularslide in line with the said transferring mechanism, substantiallydescribed.

20. In a picture-projecting apparatus, the combination with a lantern,of a longitudinally-movable picture-slide carriage arranged at one sidethereof, a transferring mechanism adapted to move the slides into thelantern and return them to the carriz'zge, mechanism for traversing thecarriage, a motor for operating said transferring mechanism andcarriage-traversing mechanism, mechanism for connecting the motor withthe parts operated thereby, a starting device including a sliding part,a pawl pivoted thereto and adapted to operatively engage a part of saidconnecting mechanism and a stationary part for engaging said pawl anddisengaging it from the said connecting mechanism, during themovement ofthe slide to operate the latter, substantially as described.

21. In a pictul e-projecting apparatus, the combination with a lantern,of a longitudinally-movable picture-slide carriage arranged at one sidethereof, a transferring mechanism adapted to move the slides into thelantern and return them to the carriage, mechanism for traversing thecarriage, a motor for operating said transferringmechanism andcarriage-traversing mechanism, mechanism for connecting the motor withthe parts operated thereby, a starting device including a sliding part,a pawl pivoted thereto and adapted to operatively engage a part of saidconnecting mechanism and a stationary part for engaging said pawl anddisengaging it from the said connecting mechanism, during the movementof the slide to operate the latter, a part for engaging said pawl andcausing it to pass the part of the connecting mechanism opererated byit, on the return movement of said slide, and a spring for returningsaid slide, substantially as described.

22. In a picture-projecting apparatus, the combination with the lantern,of a longitudinally-movable carriage arranged at one side thereof, atransferring device for said slides and mechanism for traversing saidcarriage,

comprising a rotatable shaft provided with a 'level pinion, a partloosely mounted on said MALCOLM BENTZON.

itnesses:

JOHN E. BOUSFIELD, G. G. REDFERN.

